1914-] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 439 



there is considerable water in the Topsail ore (Anal. I), the excess 

 manganese probably is present as a hydrated peroxide such as 

 psilomelane but probably in a very fine state of dissemination. The 

 remarkable feature of the samples studied is the conspicuous ab- 

 sence of the dark oxides of manganese so far as macroscopic and 

 microscopic observations are concerned but the reason for this may 

 be, in the case of the lighter samples, anyway, that where there are 

 abundant hematitic spherules there may be some masking. With 

 the darker specimens studied, such as the red and brown bands at 

 Manuels and the baritic manganese ore of Topsails (Figs. 22 and 

 32), the conspicuous manganiferous and ferruginous staining might 

 easily mask finely disseminated particles of the peroxide of man- 

 ganese. 



Recalculated Analyses. 



Elbingerode 



RL. 

 RM 

 RN , 



99.85 



100.54 

 100. 



The two most conspicuous mineral associations of the manganese 

 deposits of southeastern Newfoundland are the tricalcium phos- 

 phate, Ca3(P04)o, and barite, BaS04. Only a few of the beds 

 were analyzed for the former of these constituents where percent- 

 ages of Ca3(P04)2 ranged from 2.50 at Smith Point (Anal. K) to 

 10.31 (Anal. E) at Manuels. Anal. H shows 38.77 per cent, of 

 Ca3(P04)2, references to which are made on pages 409 and 453. It 



PROC. AMER. PHIL. SOC, LIV. 220 EE, PRINTED FEBRUARY 26, I916. 



